Evolution can be best defined as . Evolution can be best defined as . always taking a very long time to occur change in the gene pool of a population the production of new species change in the composition of populations

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population.b) the separated population is small, and genetic drift occurs.c) the isolated population is exposed to different selection pressures than the ancestral population.d) different mutations begin to distinguish the gene pools of the separated populations.e) gene flow between the two populations is extensive.